1. Does .rld glob reload all charts in the application or all charts in the workspace ?

.rld glob reloads all charts in the application.

2. I do not always plot all the 50 symbols..... but i still want them to be refreshed does this commandline reload all of them too ?

This command will reload data only if charts are open.

3. For certain symbols... i plot a few days data on the chart... but i only want to reload say the last day's data.. how can this be done ?

In this case you should use Save as to save your workspaces, then open them and select 1 day back in FormatSymbol window, when they are refreshed, you should use both workspaces.

hmm.....

Did you try doing this with 50 symbols ?
It is just too much work.. especially if this list changes from time to time.

I prefer to spend my time trading than doing all this.

As of now.. i'd rather stick to MetaServer RT 3.2 with TS.... at least i can just leave my computer on after market hours, it will to automatically download the data and next morning everything is ready for market open.
That is what i called efficient !